Expression of ER, PR, and Her-2/neu in Endometrial Cancer: A Clinicopathological Study


Objective: To determine any association between expression of estrogen receptor (ER), progesterone receptor(PR), and Her-2/neu and clinicopathological features, including survival, of endometrial carcinoma (EMC)patients.
Methods: Samples of formalin-fixed, paraffin-embedded tissue of 108 patients with EMC treated atour institution between January 1994 and December 2007 were immunohistochemically studied.
Results: ER,PR, and Her-2/neu expression were positive in 59.3%, 65.7% and 2.8% of cases, respectively. Positive ERexpression was significantly associated with grade I-II tumor while PR expression was linked with endometrioidhistology, grade I-II tumor, less myometrial invasion (MI) and negative lymph node involvement. Her-2/neuexpression was significantly associated with deep MI, while positive ER and negative Her-2/neu expression incombination was significantly associated with longer disease-free and overall survival.
Conclusion: ER expressionis a good prognostic factor while Her-2/neu expression appears to be a poor indicator for both disease-free andoverall survival, while PR tended to show favorable influence for only disease-free survival of Thai EMCs.